*{
  /* 初始化 */
  margin: 0;
  padding: 0;
}
.container{
  /* 100%窗口高度 */
  height: 100vh;
  /* 弹性布局 水平+垂直居中 */
  display: flex;
  justify-content: center;
  align-items: center;
  /* 渐变背景 */
  background: linear-gradient(200deg,#37e2b2,#2fa080);
}
/* 开始画熊猫 */
.panda{
  /* 相对定位 */
  position: relative;
  width: 200px;
}
/* 脸部 */
.face{
  width: 200px;
  height: 200px;
  background-color: #fff;
  border-radius: 100%;
  box-shadow: 0 10px 15px rgba(0,0,0,0.15);
  position: relative;
  z-index: 1;
}
/* 耳朵 */
.ear{
  width: 70px;
  height: 70px;
  background-color: #000;
  border-radius: 100%;
  position: absolute;
  top: -10px;
}
.ear.right{
  right: 0;
}
/* 黑眼圈 */
.eye-shadow{
  width: 50px;
  height: 80px;
  background-color: #000;
  border-radius: 50%;
  /* 绝对定位 */
  position: absolute;
  top: 40px;
}
.eye-shadow.left{
  transform: rotate(45deg);
  left: 30px;
}
.eye-shadow.right{
  transform: rotate(-45deg);
  right: 30px;
}
/* 眼白 */
.eye-white{
  width: 30px;
  height: 30px;
  background-color: #fff;
  border-radius: 100%;
  position: absolute;
  top: 68px;
}
.eye-white.left{
  left: 38px;
}
.eye-white.right{
  right: 38px;
}
/* 眼球 */
.eye-ball{
  width: 20px;
  height: 20px;
  background-color: #000;
  border-radius: 100%;
  position: absolute;
  left: 5px;
  top: 5px;
}
/* 鼻子 */
.nose{
  width: 35px;
  height: 20px;
  background-color: #000;
  position: absolute;
  left: 0;
  right: 0;
  margin: auto;
  bottom: 65px;
  border-radius: 42px 42px 60px 60px / 30px 30px 60px 60px;
}
/* 嘴巴 */
.mouth{
  width: 68px;
  height: 25px;
  border-bottom: 7px solid #000;
  border-radius: 50%;
  position: absolute;
  left: 0;
  right: 0;
  margin: auto;
  bottom: 35px;
}
/* 身体 */
.body{
  width: 250px;
  height: 280px;
  background-color: #fff;
  position: relative;
  left: -25px;
  top: -10px;
  border-radius: 100px 100px 100px 100px / 126px 126px 96px 96px;
  box-shadow: 0 5px 10px rgba(0,0,0,0.3);
}
/* 脚 */
.foot{
  width: 82px;
  height: 120px;
  background-color: #000;
  position: absolute;
  bottom: 8px;
  z-index: 3;
  border-radius: 40px 40px 35px 40px / 26px 26px 63px 63px;
  box-shadow: 0 5px 5px rgba(0,0,0,0.2);
}
.foot.left{
  left: -80px;
}
.foot.right{
  right: -80px;
  transform: rotateY(180deg);
}
/* 脚掌-大椭圆 */
.foot::after{
  content: "";
  width: 55px;
  height: 65px;
  background-color: #222;
  position: absolute;
  border-radius: 50%;
  left: 0;
  right: 0;
  margin: auto;
  bottom: 10px;
}
/* 脚掌-三个小椭圆 */
.foot .sole,
.foot .sole::before,
.foot .sole::after{
  width: 20px;
  height: 30px;
  background-color: #222;
  position: absolute;
  border-radius: 50%;
  left: 0;
  right: 0;
  margin: auto;
  top: 8px;
}
.foot .sole::before{
  content: "";
  left: -50px;
}
.foot .sole::after{
  content: "";
  left: 25px;
}
/* 手 */
.hand,
.hand::before,
.hand::after{
  width: 40px;
  height: 30px;
  background-color: #000;
  border-radius: 50px;
  position: absolute;
  top: 70px;
  left: -20px;
}
.hand::before{
  content: "";
  top: 16px;
  left: 0;
}
.hand::after{
  content: "";
  top: 32px;
  left: 0;
}
.hand.right{
  right: -20px;
  left: auto;
}
/* 登录框 */
.login-box{
  width: 400px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  box-shadow: 0 0 15px rgba(0,0,0,0.2);
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-110px);
  z-index: 2;
  /* 弹性布局 居中 垂直排列 */
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  /* 设置过渡 */
  transition: 0.3s;
}
h1{
  color: #1dc797;
  font-weight: normal;
  margin-bottom: 5px;
}
.ipt-box{
  width: 80%;
  margin-top: 25px;
  position: relative;
}
.ipt-box input{
  width: 100%;
  height: 35px;
  border: none;
  border-bottom: 1px solid #bbb;
  text-indent: 5px;
  outline: none;
  transition: 0.3s;
}
.ipt-box label{
  position: absolute;
  left: 5px;
  top: 5px;
  font-size: 14px;
  color: #888;
  transition: 0.3s;
  pointer-events: none;
}
/* 输入框选中或有值时输入框的样式 */
.ipt-box input:focus,
.ipt-box input:valid{
  border-color: #1dc797;
  box-shadow: 0 1px #1dc797;
}
/* 输入框选中或有值时label的样式 */
.ipt-box input:focus ~ label,
.ipt-box input:valid ~ label{
  color: #1dc797;
  font-size: 12px;
  transform: translateY(-15px);
}
button{
  width: 150px;
  height: 40px;
  background-color: #1dc797;
  border: none;
  border-radius: 3px;
  margin-top: 30px;
  color: #fff;
  letter-spacing: 10px;
  text-indent: 10px;
  cursor: pointer;
  transition: 0.3s;
}
button:hover{
  letter-spacing: 25px;
  text-indent: 25px;
  background-color: #2fa080;
}
/* 登录框向上举 */
.up{
  transform: translate(-50%,-180px);
}
a{
  text-decoration: underline;
  color: #1d2ac7;
  cursor: pointer;
}
